Document Detail

UV-vis absorption properties of polyazomethine in base and protonated with 1,2-(di-2-ethylhexyl)ester of 4-sulfophthalic acid form.
MedLine Citation:
PMID:  19570708     Owner:  NLM     Status:  MEDLINE    
The UV-vis absorption properties of undoped and doped 1,4-phenylenemethylidynenitrilo-1,4-phenylenenitrilomethylidyne (PAZ) in various temperatures are reported. It is demonstrated that the absorption spectra can be modified not only by changing the temperature from 193K to 413K, but also via acid-base doping involving the protonation of nitrogen atom in imine group. The use of special protonating agent, i.e. 1,2-(di-2-ethylhexyl)ester of 4-sulfophthalic acid (PSA) lead to the modification of the absorption spectrum of the PAZ. The imine band in UV-vis spectrum of the doped with the PSA polyazomethine is 85 nm red shifts in comparison with unprotonated one. The thermochromism of PAZ included the conformational changes in the conjugating backbone structure of the undoped and doped polyazomethine.
Agnieszka Iwan; Patrice Rannou
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Publication Detail:
Type:  Journal Article     Date:  2009-06-11
Journal Detail:
Title:  Spectrochimica acta. Part A, Molecular and biomolecular spectroscopy     Volume:  74     ISSN:  1873-3557     ISO Abbreviation:  Spectrochim Acta A Mol Biomol Spectrosc     Publication Date:  2009 Sep 
Date Detail:
Created Date:  2009-08-24     Completed Date:  2009-11-30     Revised Date:  -    
Medline Journal Info:
Nlm Unique ID:  9602533     Medline TA:  Spectrochim Acta A Mol Biomol Spectrosc     Country:  England    
Other Details:
Languages:  eng     Pagination:  174-9     Citation Subset:  IM    
Electrotechnical Institute, Division of Electrotechnology and Materials Science, 50-369 Wroclaw, Poland.
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MeSH Terms
Aniline Compounds / chemistry,  pharmacology
Azo Compounds / chemistry*
Esters / chemistry,  pharmacology*
Models, Biological
Phthalic Acids / chemistry,  pharmacology*
Polymers / chemical synthesis,  chemistry*
Schiff Bases / chemistry,  pharmacology
Spectrophotometry, Ultraviolet
Sulfonic Acids / chemistry,  pharmacology*
Thiosemicarbazones / chemistry*
Reg. No./Substance:
0/4-sulfophthalic acid 1,2-(di-2-ethylhexyl) ester; 0/Aniline Compounds; 0/Azo Compounds; 0/Esters; 0/Phthalic Acids; 0/Polymers; 0/Protons; 0/Schiff Bases; 0/Sulfonic Acids; 0/Thiosemicarbazones; 0/azomethine

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